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1999 Jeep Wrangler hissing noise

Tiny
IMAGXO
  • MEMBER
  • 1999 JEEP WRANGLER
Inside the car I hear a hissing noise like an air hose going off. When I step on the brake pedal it goes away
Monday, April 6th, 2009 AT 1:04 PM

2 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Suspect faulty/damaged vacuum hose. Inspect all vacuum hoses, especially brake booster hoses since braking stops the hissing.

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Monday, March 15th, 2021 AT 2:37 PM
Tiny
MECHCURT
  • MEMBER
  • 184 POSTS
The last post has it right but one other problem is the booster itself. They begin leaking vaccum and is heard inside the cab and it does go away when you press the pedal. You will have to replace the booster itself to fix the problem. Let us know how it comes out thanks Curt
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Monday, March 15th, 2021 AT 2:37 PM

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